US5170743A - Doctor blade device for applying, and scraping off, or for dosed application of flowable and spreadable substances - Google Patents

Doctor blade device for applying, and scraping off, or for dosed application of flowable and spreadable substances Download PDF

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Publication number
US5170743A
US5170743A US07/635,123 US63512391A US5170743A US 5170743 A US5170743 A US 5170743A US 63512391 A US63512391 A US 63512391A US 5170743 A US5170743 A US 5170743A
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United States
Prior art keywords
application
bar
substance
apparatus defined
roller
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Expired - Fee Related
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US07/635,123
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English (en)
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Joahannes Zimmer
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/44—Squeegees or doctors

Definitions

  • the invention relates, to a doctor blade device and as well as to a process using this doctor blade device.
  • a large number of processes of various kinds are known for applying flowable substances to or scraping flowable substances from flat surfaces, e.g. transfer surfaces.
  • the processes include spreading processes, coating processes using doctor rollers, applications with dosing rollers or applications by extrusion through nozzle slots.
  • the invention comprises a doctor blade device for applying, applying and scraping off, or for the metered application of flowable and spreadable substances, optionally with the use of a stencil, on preferably moving webs of material or other flat surfaces with variable amounts to be applied by means of a roller acting under magnetic pressure (directly or indirectly acting magnetic pressure) or by means of a cylindrical rod, whereby this application roller, or cylindrical rod cooperates with a sectional bar co-influencing the application process.
  • the sectional bar co-influencing the application process is mounted on the application roller or the cylindrical rod or is connected therewith and surrounds it like a sleeve bearing basically over its entire length and in any case over the area of the respective application width and covers a large portion of the shell surface of roller or of the cylindrical rod.
  • the sectional bar is rotatable about the axis of the application roller or the cylindrical rod.
  • the device of the invention consists in providing two main working components or namely an application roller, cylindrical rod and a sectional bar surrounding the cylindrical rod like a sleeve bearing and provided with a surface suited for application.
  • the two components are connected to each other through an opening shaped like a sleeve bearing so that operationally the assembly is almost a single-component articulated structure.
  • the thickness of the applied layer can range for instance from 0.5 mm to 1.0 mm.
  • a particularly advantageous characteristic of the new process technique according to the invention is that when devices produced for this process are used, the previously described four discrete process steps (a) to (d) become so variable and mutually attuned, that with one and the same technique of the invention, application device built according to the invention, a large variety of coating substances of very different viscosities in very different amounts can be applied uniformly to a great variety of substrates of any desired width.
  • the application devices according to the invention are extraordinarily simple to handle. Furthermore, the application devices according to the invention offer optimal premises for the mechanization and automation of all aforedescribed technical process components which quantitatively and qualitatively influence the coating process.
  • Another application possibility, which is very different from the above-described use according to the invention is the application in connection with flat or cylindrical stencils or cylindrical screens. This is the case when between the substrate surface coating device resting thereagainst thereagainst resting coating device produced according to the invention, a flat or a cylindrical stencil, or an open screen or a cylindrical screen is inserted. This possible use of the device is further proof of the extremely versatile applicability and of the advantageous results of the characteristic features of the invention.
  • FIGS. 1 and 2 are diagrammatically sectional views which show an embodiment in two different positions.
  • FIGS. 3 and 4 are diagrammatic sectional views which show further embodiments of the invention.
  • FIGS. 1 and 2 each show an application device 1 according to the invention in its simplest construction, without mounting and swivel devices, resting against a flat surface to be coated 2 and consisting of the sectional pivot bar 3 arranged on an application roller 4.
  • the arrow 5 shows the travel direction of the surface to be coated. It is also conceivable that the surface 2 to be coated is fixed and that the application device 1 is rolled upon the surface 2 to be coated in a direction opposite to the one indicated by arrow 5.
  • the travel direction indicated by arrow 6 is the same in both afore-described travel variants of the device, and so is the swivel motion and its effect in the process of the sectional bar around the axis of the application roller 4 indicated by arrow 7.
  • This swivel motion of the sectional bar 3 causes a change in the pressure of the substance application in the substance contact area 8 (equal substance contact time interval) in the area upstream of the transfer, respectively removal process.
  • the surface 9 is rotated concentrically to the application roller 4, i.e. about this roller, respectively around the axis of the application roller 4.
  • the swivel range through the two end positions of the sectional bar 3 is indicated in a broken line and it can be 5° to 100°. Preferably it amounts to approximately 90°.
  • the reference numerals 29 and 28 reproduce a corresponding point of the sectional bar in the two positions. It has to be pointed out that, although it is advantageous when the sectional bar 3 surrounds the application roller 4 by two thirds, other proportions are also possible. However given the case, instead of the slide-on connection another type of connection has to be used, e.g. connection rods, a connection by weight load or axle end pivot, or also by magnetically caused attraction of the two components.
  • the rotated position of the sectional bar 3 shown in FIG. 2 causes the application surface 9 to exert a very high pressure on the application substance 10.
  • the size of this substance-application pressure is also influenced by the viscosity and nature of the substance to be applied and by the speed of the application.
  • FIG. 2 The arrangement of an application device according to the invention represented in FIG. 2 illustrates the device, as well as the successive process steps according to the invention.
  • the device 1 i.e. the application roller 4 and the sectional bar 3 mounted onto it, i.e. both components working together as a single-component device, are pressed uniformly against the application surface 2, over its entire length extending in axial direction.
  • the sectional accumulation surface 9 of the area 8 and the bordering area 11 of the application roller 4 Underneath the sectional accumulation surface 9 of the area 8 and the bordering area 11 of the application roller 4 the actual application area controlling quantitatively and qualitatively the application effect is created and it consists of the two component areas 8 and 11.
  • the application process can be controlled through the following parameters. Length and shape (i.e. straight, curved, stepped) of the application surface 9, angular position, i.e. inclination of the application surface 9 with respect to the application surface 2, height of the gap range, respectively the distance between the application surface 9 and application surface 2 in the application area 8 and in the application area 11. Further, the gap range between application roller 4 and application surface 2, respectively table surface, conveyor belt or the like supporting the web to be coated, which applies when the material to be applied is compressable. The adjustment of the gap range takes place through:
  • a further important criterium is the relationship between the area extension length 8 of the application surface 9 and the diameter of the application roller 4. It is possible to combine a relatively long surface 9 with a relatively small roller diameter, or also a relatively short surface 9 with a relatively large roller diameter. The longer the surface 9, the narrower the gap set between the 9 and 2 and the higher the viscosity and the web speed, the stronger is the pressure exerted on the substance by the surface 9 in the area 8 against the web 2 and with an equal force (i.e. counterforce) the application roller 4 is relieved of pressure.
  • the individual component steps of the application process are the following: (a) the feeding of the substance to be applied and the start of the substance/substrate contact take place in the area in front of the application device, a fact which is not shown in the figures; as a result of the next process step (b), the metering (first of all the dosage of the amount) controlling the quantitative and qualitative parameters of the application process are performed in the application zone formed by the path segments 8 and 11.
  • the two elements 3 and 4 of the device act as a device with a single-component construction and that due to the rotation of the component 3 a control of the application parameters and their adjustment to the process become possible.
  • An additional feature of the invention relating to the above-described application process and device techniques consists in the fact that the application element 4 can be selected at will to be either a rotating roller or a nonrotatable cylindrical spreading rod. Furthermore, in the application device built according to the invention it is even possible to make the process and device selection between an application with rotating roller or an application with a nonrotatble roller or cylindrical rod--even while the device is operating.
  • a further feature of the invention is the possibility to connect the application roller 4 with a drive not shown in the drawing, whereby the drive can be set to be synchronized, to trail or to lead. This results in a further parameter for the quantitative and qualitative control of the application process.
  • the process step (c) takes place according to the path segment or the time interval at the point or the moment when at the end of the path segment 11 the contact between the application element 4 and the application surface 2 is established.
  • the measure which is extremely important for the application process within the general course of this process is the uniform distribution of substance over the entire application width or the length of the application device and it is carried out--as a second working function--by the surface 9 of the sectional bar 3 due to the same combination, i.e. the functional connection of the aforedescribed acting manner of the surface 9 with the surface shell of the application element 4 touched by the substance, whereby, as already described, the substance application pressure is generated.
  • the last component step of the process (d) takes place at the path segment where the path area 11 is ending and the application element 4 is pressed by magnetic force over its entire length or its entire application width--against the substrate or application surface 2 or a stencil located therebetween.
  • the uniformity of this pressure over the entire length of the application device, respectively over the entire application width, resulting from the way specific to the invention in which this pressure is generated, is also an important factor in finalizing the even distribution over the entire width in the path segments 8 and 11.
  • An additional characteristic feature of the invention aiming at a precise metering of the amounts to be applied per surface unit is achieved due a certain structure of the shell surface of the application roller 4 or the thereagainst pressed apex area of the cylindrical rod 4.
  • the surface can for instance be smooth, rough or ribbed, or in the shell surface of the application roller 4 a shallow-cup or grid-like structure can be devised.
  • the volume of such recesses in the surface of the application roller 4, or cylindrical rod play a part in determining the resulting applied amounts.
  • FIGS. 3 and 4 two variants of the mounting and adjusting arrangements of the application device are shown.
  • FIG. 3 shows a possible construction of the sectional swivel bar 3 with at least one part 12 through which the swivel motion 7 is induced by a regulating device in the application device, respectively transmitted to the sectional swivel bar 3.
  • the regulating parts 13, 14 causing the swivel motion 7 can be moved rectilinearly in the direction of the arrow 15 so that the rectilinear motion 15 is converted into a swivel motion 7 by the device 13, 14.
  • the swivel motion 7 can be executed by a regulating device making a swivel motion.
  • the surface 16 of the sectional swivel bar 3 is rounded. However, this rounding could be limited only to a portion of the bar 3 or it could be located on a separate component connected with bar 3.
  • this rounded portion is concentric to the axis of the application roller, respectively the sectional bar 4 and that this rounded surface 16 concentric with the swivel axis rests against a surface 17 of the buffer component 18, which can be displaced in the direction of the arrow 19, if necessary. It is possible to limit the application device in direction of arrow 5 (travel direction) for instance by means of a centrally located component 18. It is also possible to limit the advance possibilities of the application device and also to insure its parallel positioning by means of for instance two components similar to 18, each located in the end areas of the application device.
  • FIG. 4 a mounting and at the same time swivel actuating component 20 is represented, which is mounted vertically movable at both ends of the application device 1.
  • the application device is held and guided in an inclined recess 22 of the component 20, by means of a pivot 21 attached to both ends of the sectional bar 3.
  • the pivot 21 is located in the upper area of the recess 22.
  • the recess 22 can be provided in the sectional bar 3 or in another component rigidly connected with this bar. Logically in this case the pin, bolt or the like would no longer be attached to the sectional bar 3, but to the component 20.
  • a magnetic source 26, 27 shown in FIG. 4 instead of this embodiment of a magnetic source 26, 27 shown in FIG. 4, also other embodiments are conceivable, such as a magnetic roller. But it is also conceivable to use instead of a magnetic roller or a magnetic device 26, 27 a common roller of magnetizable steel, with the sectional bar 3 or the roller 4 or both these elements being magnetically active and exerting magnetic pressure on the steel roller.
  • the magnetic source establishes the position for the doctor blade device according to the invention, namely also in the operational state, besides it presses the doctor blade device to the extent required by the working function of the application.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US07/635,123 1989-07-06 1990-07-04 Doctor blade device for applying, and scraping off, or for dosed application of flowable and spreadable substances Expired - Fee Related US5170743A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0164989A AT401480B (de) 1989-07-06 1989-07-06 Rakelgerät zum auftragen bzw. auftragen und abrakeln bzw. zum dosierten auftragen fliessfähiger oder streichfähiger substanzen
AT1649/89 1989-07-06

Publications (1)

Publication Number Publication Date
US5170743A true US5170743A (en) 1992-12-15

Family

ID=3517991

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/635,123 Expired - Fee Related US5170743A (en) 1989-07-06 1990-07-04 Doctor blade device for applying, and scraping off, or for dosed application of flowable and spreadable substances

Country Status (10)

Country Link
US (1) US5170743A (fr)
EP (1) EP0433415B1 (fr)
JP (1) JPH0775697B2 (fr)
AT (1) AT401480B (fr)
AU (1) AU5843590A (fr)
BR (1) BR9006846A (fr)
DD (1) DD297921A5 (fr)
DE (1) DE59008303D1 (fr)
ES (1) ES2069738T3 (fr)
WO (1) WO1991000779A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6406574B1 (en) 2000-11-29 2002-06-18 Collins & Aikman Floorcoverings, Inc. Method for assembling a reinforced vinyl-backed carpet

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9103570U1 (fr) * 1991-03-21 1992-07-23 Zimmer, Johannes, Klagenfurt, Kaernten, At
GB2259262B (en) * 1991-09-03 1995-04-12 Univ Hull Blade control system
DE19707921C2 (de) * 1997-02-27 1999-11-04 Kunststoff Zentrum Leipzig Verfahren und Vorrichtung zum maßgenauen Beschichten rotationssymmetrischer Körper mit strahlenhärtbaren fließfähigen oder streichfähigen Monomer-/Oligomer-Systemen
DE29716541U1 (de) * 1997-09-11 1999-01-14 Zimmer Johannes Vorrichtung zum Auftragen von Flüssigkeiten auf ein Substrat

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH88675A (fr) * 1920-06-24 1921-03-16 Panchaud Louis Dispositif de freinage pour bateaux.
DE387188C (de) * 1922-08-22 1923-12-21 Wenzel Dittrich Schliesseinrichtung mit Zahlenindex
DE389676C (de) * 1921-12-16 1924-02-05 Schweiter Ag Maschf Kreuzspulmaschine
US3029779A (en) * 1958-10-15 1962-04-17 Beloit Iron Works Reverse bar coater
US3084663A (en) * 1960-08-29 1963-04-09 Champion Papers Inc Doctor blade for coating apparatus
DE2034004A1 (de) * 1970-07-09 1972-01-20 Feldmühle AG, 4000 Dusseldorf Rollrakel in Streichvorrichtungen
FR2219006A1 (fr) * 1973-02-27 1974-09-20 Buser Ag Maschf Fritz
DE2901830A1 (de) * 1978-02-06 1979-08-09 Buser Ag Maschf Fritz Verfahren und vorrichtung zur steuerung des farbmengenauftrags auf eine warenbahn einer siebdruckmaschine
US4658753A (en) * 1984-06-29 1987-04-21 Oy Wartsila Ab Roll blade assembly for a paper coating machine
EP0311728A1 (fr) * 1987-10-10 1989-04-19 Johannes Zimmer Dispositif de raclage
EP0311745A1 (fr) * 1987-10-10 1989-04-19 Johannes Zimmer Dispositif d'enduction
EP0311730A1 (fr) * 1987-10-10 1989-04-19 Johannes Zimmer Dispositif de raclage

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE758785A (fr) * 1970-02-09 1971-04-16 Boise Cascade Corp Appareil destine a l'impregnation du carton ondule
DE3311081A1 (de) * 1983-03-26 1984-09-27 J.M. Voith Gmbh, 7920 Heidenheim Rakelhalterung
DE3324700A1 (de) * 1983-07-08 1985-01-17 Wolfgang Dipl.-Ing. 5000 Köln Breynk Beschichtungsvorrichtung
AT387188B (de) * 1983-10-06 1988-12-12 Zimmer Johannes Rakelvorrichtung mit einer, vorzugsweise magnetisch angepressten rakelrolle
AT389676B (de) * 1983-10-06 1990-01-10 Johannes Zimmer Rakelvorrichtung mit einer vorzugsweise magnetisch angepressten rakelrolle
FI853041A0 (fi) * 1985-08-07 1985-08-07 Valmet Oy Anordning foer belaeggning av materialbana.

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH88675A (fr) * 1920-06-24 1921-03-16 Panchaud Louis Dispositif de freinage pour bateaux.
DE389676C (de) * 1921-12-16 1924-02-05 Schweiter Ag Maschf Kreuzspulmaschine
DE387188C (de) * 1922-08-22 1923-12-21 Wenzel Dittrich Schliesseinrichtung mit Zahlenindex
US3029779A (en) * 1958-10-15 1962-04-17 Beloit Iron Works Reverse bar coater
US3084663A (en) * 1960-08-29 1963-04-09 Champion Papers Inc Doctor blade for coating apparatus
DE2034004A1 (de) * 1970-07-09 1972-01-20 Feldmühle AG, 4000 Dusseldorf Rollrakel in Streichvorrichtungen
FR2219006A1 (fr) * 1973-02-27 1974-09-20 Buser Ag Maschf Fritz
DE2901830A1 (de) * 1978-02-06 1979-08-09 Buser Ag Maschf Fritz Verfahren und vorrichtung zur steuerung des farbmengenauftrags auf eine warenbahn einer siebdruckmaschine
US4658753A (en) * 1984-06-29 1987-04-21 Oy Wartsila Ab Roll blade assembly for a paper coating machine
EP0311728A1 (fr) * 1987-10-10 1989-04-19 Johannes Zimmer Dispositif de raclage
EP0311745A1 (fr) * 1987-10-10 1989-04-19 Johannes Zimmer Dispositif d'enduction
EP0311730A1 (fr) * 1987-10-10 1989-04-19 Johannes Zimmer Dispositif de raclage
US4920914A (en) * 1987-10-10 1990-05-01 Johannes Zimmer Doctoring installation and doctoring device
US4993352A (en) * 1987-10-10 1991-02-19 Johannes Zimmer Squeegee device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6406574B1 (en) 2000-11-29 2002-06-18 Collins & Aikman Floorcoverings, Inc. Method for assembling a reinforced vinyl-backed carpet

Also Published As

Publication number Publication date
ES2069738T3 (es) 1995-05-16
AU5843590A (en) 1991-02-06
WO1991000779A1 (fr) 1991-01-24
JPH04500775A (ja) 1992-02-13
DD297921A5 (de) 1992-01-30
ATA164989A (de) 1996-02-15
EP0433415A1 (fr) 1991-06-26
DE59008303D1 (de) 1995-03-02
EP0433415B1 (fr) 1995-01-18
BR9006846A (pt) 1991-08-06
JPH0775697B2 (ja) 1995-08-16
AT401480B (de) 1996-09-25

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